"AA" Cells, Brand Comparison:
Test results for several AA
Conclusion (Of the batteries tested and ignoring test date):
Ikea Best value - most energy per $ (69.2 Minutes/Penny $0.17/bat)
Energizer Lithium Most energy / battery (1547 minutes dischg $1.67/bat)
|Sorted by best value (Minutes / Penny)|
|Sorted by most energy (Minutes / battery)|
|Make||Minutes||Cost /bat||Nr in Pkg||Mins/Penny||Supplier||Part Nr.||Date|
|Energizer Lithium||1,547||$1.67||4||9.3||Sam's Club||08/10|
|Members Mark||1,212||$0.23||48||52.7||Sam's Club||912986||01/10|
|Thunderbolt (blk/red)||1,177||$0.21||24||56.0||Harbor Freight||92404||01/15|
|Thunderbolt (blk/org)||1,148||$0.21||24||54.7||Harbor Freight||01/15|
|Thunderbolt (blk/yel)||371||$0.21||24||17.8||Harbor Freight||61675||09/14|
batteries were connected to a constant load of 12 ohms during the test period.
2) The total discharge time was recorded until the terminal voltage dropped to 1.08v
3) Ambient temperature during the test was 70-72 degrees F
4) All batteries were tested within 5 days of purchase from local stores.
These results are useful
comparisons when all are measured with the same conditions.
However, keep in mind:
1) Real life loads can be constant resistance, constant current or constant power.
2) Actual capacity [watt-hours or joules] was not measured.
3) Also, not addressed, are other factors unique to specific applications such as
discharge current, ESR (ionic and resistive), battery temp, product cutoff voltage,
self discharge and other shelf life factors.
1) I did not shop for the best price. Sales and coupons may change the "best buy" conclusion.
2) Old tests may not represent current prices and performance
3) Use Lithium for the greatest energy [and probably longest shelf life], but at much greater cost.
4) With a constant load, starting current drain is 125mA, end current drain is 90mA
For reference, a 100mA constant load for 1200 minutes = 2000 mA-Hrs
This is about 2.5W-Hrs of energy (for 1.25v average), cost about $0.25
~1000x more expensive than the grid power (portable power is expensive)
5) The Lexcell batteries were provided by Jameco. They didn't have a use by date.
Their condition is suspect because unloaded initial terminal voltage was 1.40v(#1) and 1.35v(#2)
6) Ikea batteries provided by C Golden in Ga 1 month after purchase, unused.
Conctact information is (HERE) if you have questions or comments.